[Home](./index.md) > [rc-js-util](./rc-js-util.md) > [arrayCopyInto](./rc-js-util.arraycopyinto.md) ## arrayCopyInto() function Make an array contain the same items as another. **Signature:** ```typescript export declare function arrayCopyInto(from: ArrayLike, to: TItem[], startIndex?: number, length?: number): void; ``` ## Parameters

Parameter	Type	Description
from	ArrayLike<TItem>	The array to copy from.
to	TItem\[\]	The array to copy into and resize.
startIndex	number	_(Optional)_ The index to start with in the from array.
length	number	_(Optional)_ The index to end with in the from array.

**Returns:** void ## Remarks See [arrayCopyInto()](./rc-js-util.arraycopyinto.md).